Question Number 77757 by abdomathmax last updated on 09/Jan/20
$${find}\:\int_{\mathrm{1}} ^{+\infty} \:\:\frac{\left({x}^{\mathrm{2}} −\mathrm{1}\right){dx}}{{x}^{\mathrm{4}} −{x}^{\mathrm{2}} \:+\mathrm{1}} \\ $$
find-1-x-2-1-dx-x-4-x-2-1-